Turbine-rotor.



R. 0. MULLER- TURBINE ROTOR.

APPLIUATION TILED SEPT. 16, 1911.' 1 ,O26,821 Patented May 21, 1912.

2 SHEETS-SHEET 1.

R. 0. MULLER,

TURBINE ROTOR.

APPLmATIoN FILED SBPT.16, 1911 2 SHEETSSHBET 2.

UNITED STATES Pg' rENT OFFICE.

RICHARD OTTO MULLER, OF WASHINGTON, DISTRICT OF COLUMBIA.'

TURBINE-ROTOR.

To all whom it may concern: Be it known that I, RICHARD O'r'ro MUL- LER, a subject of the German Emperor, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Turbine-Rotors, of which the following is a specification.

My invention relates. to the class of rotors for radial flow turbines, in which vanes of where strength is required, and one of maximum resistance to corrosion, though perhaps of inferior strength, may be used on surfaces subject to objectionable corrosion.

A further object is to provide a construction which can be rapidly assembled from duplicateparts, made in quantities, by inexpensive methods, and kept ready in stock.

A further object is a construction in which the vanes, and the disks or laminations forming the body of the rotor, perform the reciprocal functions of locating and holding each other rigidly together while providing an ample leverage of vane fastening to resist centrifugal action.

These objects are attained in the construction shown in the accompanying drawing in which like symbols are used to designate the same parts throughout, and in which- Figure 1 is an ''elevation of the bladed side of the rotor; Fig.2, a longitudinal section on line A A, Fig. 1; Fig. 3, a similar section showing the internal annular spacing rings omitted from the rotor body; Figs. 4, 5 and 6 show details of the vanes; Fig. 7 is a side elevation of the disk 6 of which the rotor body 7 is principally composed, and Fig. 8 is a side elevation of the annular ring 8,

- used in the several locations indicated.

Referring to Figs. 4, 5 and 6, 1 is the vane usually made of bronze or other non-corroding material. The longest dimension of its crescent shaped section is located in a ra dial plane with reference to the rotor body and shaft, and is therefore well adapted to resist centrifugal force. At one end is the Specification of Letters Patent.

Application filed September 16, 1911.

Patented May 21, 1912.

Serial No. 649,755.

long trunnion 2, adapted to pass through the rotor body and, by the crescent shape which it retains, excepting at the edge where a small portion is cut away to provide a shoulder against which to rivet, is adapted to locate the vane and hold it rigidly in its radial plane. At the other end of the vane is the short trunnion 3 of similar shape, which passes through the shroud ring 4 and is riveted as shown in Fig. 2. The completed vanes may be rapidly out, each at a single stroke, from a finished rolled bar of crescent shape, by a shear having knives of suitable form.

Fig. 7 shows the rotor disk or lamination 6, of which several are used packed together to constitute the rotor body 7 as shown in Figs. 2 and 3. They are made of sheet metal as thick as can be conveniently unched in duplicatewith holes toreceive an closely fit the trunnions 2 of the vanes.

Fig. 8 shows the annular ring 8 whose form is like the disk 6 but having more of its center removed, It is also punched from sheet metal and, like the disk, is made of different materials according to the position .to be occupied in the rotor. When used-in the interior of the rotor body, as for the space rings 9, they are made of steel. When used at the surface, and especiallywhen in contact with rapidly flowing fluid, :as at the shrouds 4 and 5, they are made of non-corroding material as brass, bronze or aluminum. When the active part of the vane is of considerable length and consequently" needs a correspondingly long trunnion 2 for support, the annular rings are used for spacing between the more active disks-6 located near the surface of the rotor body. Otherwise they are omitted as in Fig. 3. The two outside 'disks 10 and 11 may also be made of non-corroding material of suflicient strength for self support and then, when all are tightly fastened together, the vane trunnions 2 and 3 servim as rivets as shown in Figs. 2 and 3, the on y opportunity for corrosion is at the rotor rim where the edges of the disks are exposed. These edges may now be hammered or burnished downto prevent the entrance of fiuidbetween the laminations and the rotor is practically corrosion proof.

The shroud ring 4 serves to hold the fluid jet against spreading upon its passage through the vanes It is composed of the annular rings 8, as in Fig. 8, assembled with the outer trunnions 3 of the several vanes, in

the same manner as the rotor-body. it will be noted that the width of the ring is reduced to. an amount only slightly in excess of that of the vanes but with the openings for the trunnions the same as before.

The rotor as above described ismounted upon a suitable hub or center 12, secured to the shaft 13 'by any suitable fastening andi used in the turbine in the usual manner.

plane through said shaft, said rotor body being composed of a set of laminations having duplicate perforations, and so assembled upon a'suitable center or hub as to afford a plurality of open passages through the v set in a direction parallel with said shaft and adapted to receive and fit the trunnions of said varies; and said crescent shaped vanes, each having a portion of its edge cutaway at one end thus leaving a trunnion y riveting, to locate and fasten itself while of ashape otherwise the same as the body of thevane and adapted to pass through and fit tightly into one of said openings rovided therefor in said rotor bod'y,'and

' clamping said laminations tightly together,

the wholesubstantially as and for the pur-' pose setforth.

2. A radial flow turbine rotor comprising a shaft; a rotor body or wheel mounted thereon, with crescent shaped vanes projecting from the side thereof in a direction 5* parallel with said shaft and having the greatest width; of vane lying in a radial plane 'throughsaid shaft, said rotor body being composed of a set of. laminations havfin'g duplicate perforations, and so assembled -'upon a suitable center or hub'as to afford to having a port-ionof its edge cut away at a plurality of open passages through the set ina direction parallel with said shaft I and adapted to receive and fit the trunnions of'said vanes, part of said laminations, in

" the interior of said rotor body, being floating' annular spacing rings while those near the surface extend inwardly to the hub to iwhiehithey are firmly secured; and said "crescent shaped vanes, each having a portion of its edge-cut away at one end thus leaving a trunnion'of a shape otherwise the same as the body 'of the vane and adapted topass through and fit tightly into one of said -openings provided therefor in saidrotor body, and by riveting, to locate and fasten itself while clamping said lamina- Heretions tightly together, the whole substantially as and for the purpose set forth.

- 3. A radial flow t-urbinerotor comprising a shaft; a rotor body or wheel mounted thereon, with crescent shaped vanes projecting from the side thereof in a direction parallel with said shaft and having the greatest width of vane,lying in a radial plane through said shaft, said rotor body being composed of a set of laminations having duplicate perforations, and so assembled upon asuitable center orhub as toaflford a plurality of open passages through the the body of the vane and adapted to pass through and fit tightly into one of said openings provided therefor in said rotor body, and by riveting, to locate and fasten itself while clamping said laminations tightly together, the whole substant-iallyas and for the purpose set forth.

4. A radial flow turbine rotor comprising a shaft; a' rotor body or wheel mounte thereon, with crescent shaped vanes projecting from the side thereof in a direction parallel with said shaft and having the "greatest width of vane lying in a radial plane'through said shaft-,2 said rotor body being composed of a set of. laminationshaving duplicate perforations, and so assembled upon a suitable center or hub as to afford a plurality of open passages through the set in a direction parallel withjsaid shaft and adapted to receive and fit the trunmons annular laminations having duplicateperforations,':assembled similarly to said rotor body and adapted to receive and fit other similar trunnions at the outer end of said vanes; andsaid crescentshaped vanes, each *through the set in a direction parallel with said shaft and adapted to receive, fit and be clamped together by the riveted trunof said vanes; a shroud ring composedof nions of suitable vanes; said .laminations specification in thGr-PIGSBDCB of two subbeing ofba variety of materials, those onhthe scribing. witnesses. interior 'eing o greater strength and t ose on the surface of greater resistance to cor- RICHARD OTTOMULLER' /5 rosiveaction, thewhole substantially as and Witnesses:

for the purpose set forth. CLINTON FLOOD,

' "In testimony whereof, I have signed this J OHN' MGCALL.

copies of this patent may be attained for five cents each, by eddressing the commissionepof vli'atmits, Washington, D. c. 

